package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.service.SetmealService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
     *
     * 根据菜品id删除口味数据
     * @param
     */
    public DishVO getByIdWithFlavor(Long id) {

//        根据id查询菜品数据
        Dish dish = dishMapper.getByid(id);
//        根据菜品id查询口味
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
//        封装到vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
//        修改菜品的基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
//        删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
//        然后再重新插入
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
//            向口味插入n条数据
            dishFlavorMapper.inserBatch(flavors);
        }
    }


    /**
     * 根据分类id查询菜品
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish> dishlist=dishMapper.list(dish);
        return dishlist;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
       Dish dish= Dish.builder()
                       .status(status).id(id).build();
       dishMapper.update(dish);
       if (status==StatusConstant.DISABLE){
           ArrayList<Long> disheIds = new ArrayList<>();
           disheIds.add(id);
           List<Long> setmealIds=setmealDishMapper.getSetMealIdsByDishIds(disheIds);
        if (setmealIds!=null&&setmealIds.size()>0){
            for (Long setmealId : setmealIds) {
                Setmeal setmeal=Setmeal.builder()
                                .status(StatusConstant.DISABLE)
                                        .id(setmealId).build();
                setmealMapper.update(setmeal);
            }
        }
       }
    }

    //
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//       向菜品表插入数据
        dishMapper.insert(dish);
        Long id = dish.getId();
//        向口味表插入n条数据

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
//            向口味插入n条数据
            dishFlavorMapper.inserBatch(flavors);
        }
//

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /***
     * 菜品批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        判断当前菜品是否能够删除 ---是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish=dishMapper.getByid(id);
//            菜品处于起售中 不能删除
            if (dish.getStatus()==1){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

//        List<Dish> dishes=dishMapper.getIds(ids);
//        for (Dish dish : dishes) {
//            if (dish.getStatus()==0){
//                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
//            }
//        }
//        判断当前菜品是否能够删除---是否被套餐关联
        List<Long> setmealIds=setmealDishMapper.getSetMealIdsByDishIds(ids);
//        删除菜品表中的菜品数据
        if (setmealIds!=null&&setmealIds.size()>0){
//            c菜品被套餐关联了 不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
//        删除菜品关联的口味数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
////            删除菜品相关联的口味的数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
//        根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);
//        根据菜品id集合批量删除关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
